NASA is poised to embark on an ambitious mission as the launch window for its latest advanced telescope, SPHEREx, opens just after 10 PM ET today from Vandenberg Space Force Base in California. This innovative mission aims to map the entire celestial sky, providing insights into the early universe and the formation of fundamental cosmic structures.

SPHEREx will operate in a low Earth orbit, positioned approximately 400 miles above the planet’s surface. Unlike the James Webb Space Telescope, which is designed to focus on specific astronomical targets with unprecedented resolution, SPHEREx will conduct an “all-sky” survey, systematically mapping the sky four times over the course of its two-year mission.

The telescope is engineered to collect light primarily in the near-infrared spectrum, allowing it to capture signals that originated as much as 10 billion years ago. This capability is essential for researchers seeking to understand the distribution of galaxies in the early universe and to gain insight into the cosmic expansion that followed the Big Bang. Through its observations, SPHEREx will investigate the formation of the earliest stars and explore the presence of water and organic molecules in the cosmos.